32
5.9.7
Combined flue outlet/air inlet system
Unit category : C43
The communal air supply and the communal output of the combustion gases may be
carried out concentrically or separately.
Permitted pipe length
For parallel: Air supply and combustion gas outlet together, excluding the length of the
combi feedthrough.
For concentric: total pipe length, excluding the length of the combi feedthrough.
Parallel
Concentric
60/100
Concentric
80/125
RHOBG12AAV1
100 m
10 m
29 m
RHOBG18AAV1
100 m
10 m
29 m
The minimum diameters of the communal air supply and flue tube system based
on the continuation sheet 2001-02 inspection requirements no, 138 of Gastec.
RHOBG12AAV1 & RHOBG18AAV1
Number
of units
Concentric
Parallel
Flue gas
Air supply
Flue gas
Air supply
2
135
253
135
214
3
157
295
157
249
4
166
311
166
263
5
175
328
175
278
6
184
345
184
292
7
193
362
193
306
8
201
376
201
318
9
210
393
210
332
10
219
410
219
347
11
228
427
228
361
12
237
444
237
375
13
246
461
246
389
14
255
478
255
404
15
264
494
264
418
16
272
509
272
431
17
281
526
281
445
18
290
543
290
459
19
299
560
299
473
20
308
577
308
488
IMPORTANT
•
A roof outlet through a Combination Air Supply-combustion gas
outlet system is permitted.
•
For the communal combustion gas outlet hood and air supply
hood, a declaration of no objection or a Gas certificate from the
Gastec
Gas institute is required.
•
The passage of the pressure balancing opening at the bottom of
the communal air supply and flue gas outlet system is equal to
0.44 times the flue gas outlet surface.
Summary of Contents for Rotex GW-30 H12
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